Use Scrivener's Outliner to create a project-specific to-do list, enhancing task management beyond a simple text file. Organize tasks using folders and custom metadata, view additional details in the Outliner, and attach relevant files to tasks for better project tracking. While not a dedicated task manager, Scrivener offers flexible ways to manage writing-related tasks.
Use Scrivener’s Outliner as a To-Do List for Your Writing Projects

